Rotary tiller tooth and mounting



March 30, 194s. R. A. KRQPP 2,438,707

ROTARY TILLER TOOTH AND MOUNTING Filed April l5, 1944 5 Sheets-Sheet 1.iL/Zay??? March 30, 1948. R. A. KROPP 2,438,707 l ROTARY TILLER TOOTHAND MOUNTING Filed April 13, 1944 5 Sheets-Sheet 2 March 30, 1948. R, A.KROPP 2,438,707

ROTARYTILLER TOOTH AND MOUNTING Filed April 15 1944 5 Sheets-Sheet 3 I??Ven for joy /zffa/a Patented Mar. 30, 1948 ROTARYFTILEERTOOTH" NDMUNTINKropp, Riverlorest, Ill.,.assignorto :Kromr Forge Companmicero, Ill., aIcorporation of Illinois conditionerf Aorftlller:'wherein' theY -tinesiare cirw 15 cun'rierentielly;A arranged' fon? independent` sur# portingl'rubs/orl .piatesfhming.'sleevesV connectedto azi Gommoni-shaft to"Afaciliteit@y EassemblyJ and.

mountingthereof; as Wel-1 as repair ,oiwrepiatce-v Another' objectisvtofsow constructV and mount the tines thaniftheyA will f befpreventedfrom--working loose and willbe...positivelyretainedk againstdisplacement. I

Another` l object .J is4 to facilitate 4ma.-r1u`f,cture. and;l perm-it.the.. mountingf.piatti-:sv for th`e times, together with theirhubs ors1eeves,'to be readily.. made as .orgirlgs` y Frther objects` and(advantages will' appear and beJo'rought out'moreflijr. intlfiefollowing. 30v

ligv.' '11 `is 5a.'- sectionai View? taken onwithe. line X12-XI of Fig.10.1

'Hm/ingr reference vto Fig. lfavrotozeashaftwis designated 'at ifdandiis designed to; tzrltef'a*plm` rality ofl mountingplateszrl'fraidiaxlly fformedzatx one fend "of :sleeve-sa or.'hubs'figwhioh arecadaapted to mbe' arrangedin?endwsezzabuttingrrelatiorfwitif theplate `or flange? atifneemi-,f,-a'gainstthcfrend' of they sleeveffor :hubfofthef'aidjaeentplaterand adapted to'f-be atd'jilstailolil xedf-tocP-the shaft, sa's:will -belater expliined:

Tines= orrA cutting;V blades` k59.; y. curved :in ls reverseEdirections, .thatf is,-` on 1an f: ogee: or: reverse: curve;

aindfhaving; sharp points-dill 'adapted tofcutfforf dig t, into: theground, are4 formed with coilsfv'otf torsion :springs 6| in'thei-rflengths*and/adjacent theirinner portions;-Phe-foute1',-"curvedportionsy ofl the Atines are fbentf-vin: an arefawayiromfth'e' direction oftravel of the. lfree yendswthereof:when

0 rotated. in T use; so: as: toi enterl the igrotlnd:rectiv linearly fof the* points Vand out: intonthground an` arcat yaifsuittlolmdepth;such. asffeightforI nine pinches; which e will s defi-nei @therdepthofthe-- out in f the-:soil :in lconditioning and fprepafringethelatterfor planting.

The. coils or utorsion f springs 64, Yare .-aidalpted, when: the-AA11i-nes pass-or digs-into? thesgroundto be'. Wound up.horplowed21u-nder` "tension, :so-fausto` store; up; energy; and; uponcoming. out to fre-- lease'v with af resi-lient actiong which 1 willeectivels breakthelsurfaceforf Vcrul'st of i their ground' and. throw r'ori Wedge'. the -soiivagainsbi--theehood' thereover. vto lpulverize thesoi-l in r`awmannerAL -to be further exloleuiried.-V

The 1 spring Imetal of thre ltildes-emerge {rom-.the c'oilsfat ailpmintvspalced :from Athe l center-linefbetweeni". the' tip ofthempoint'f16m-farlo. @the Ycenterv of: theJcoil. 6I; `asfslaovv'n atzffajndthesef end portionsk or :'shainks .-of tire.tines are ,formedwith. an open loop, eye, yor hook-.635`v the endf-portions 64-ofWhichftermi-nate adjaoentithef coil/fspafced on the l opposite sidet-oiAthe :center-line @and adjacent Itlnefouter surfacetoi the coiLSi-gtoetter retain the -tinesfV in vv.position in radial recesseslprovidedon'. .a fialtrside offtlie-qplategl.

located at the centers of the recesses, or between them, if desired, soas to retain the loops or eyes and the tines rmly in position andagainst displacement or turning when tightly bolted.

By having the extremities 64 beneath the coils 8| when they open, partof the strain is removed from the bent portion of the coil where theloop or eye 63 is formed to help resist the load on the spring or metalof the tine due to the latter meeting with resistance in entering theground or striking obstructions, and prevents the tines from workingloose. The coils also, permit the tines to give or move upwardly `andlaterally to either side to pass obstructionsv and prevent breakingthereof.

The tine-carrying members, and more particularly the sleeves or hubs 58thereof are arranged e 4 toward the lateral face of the plate, andslmilarly displaced outwardly, but, cannot Work loose or becomedisplaced radially. Especially is this true in theV form shown in Figs.6 and 7 with the sides of the shank offset or curved and bent inwardlyas described, and with the end portions 16 engaging the coils 6| in thesame mannerthat the end portions 64 engage said coils.

Plate 51 is provided with holes 11, which may be between recesses 1 I,to receive connecting and clamping means, or bolts 1B, and a retainingplate orwasher 1 9 may be similarly mounted in position, Yas described,in connection with the other form of mounting plate, that is, a Washeror annular plate may be provided for each bolt with washers and nuts, ora single annular plate to be appropriately keyed to the shaft ll! l(Fig.

1) and for this purpose are provided with spline grooves or keyways 10.1.-

" If desired, the plates 51 .may, also, be provided with staggeredVrecesses 65a in theV opposite faces,V but in either construction,.manufacture as' a forging isfacilitated in producing the plates andsleeves together, recessed as `-described.

The form of tine above set forth is .shown in Fig. 2 andthe mountingplate thereof in Figs. 3, 4 and 5. As shown in Figs. 6 and 7, themount'- ingplates may take a different form in which the plate portion51' is provided with recesses 1| also of circular contour at their innerportions, but'extending for the greater portion of a circle, and havingrestricted outer throat portionsvwith parallel flat inner sides or faces12 extending. from the outer portions of the circular parts of therecesses 1I as chords of arcs of the circle parallel to the diameter, tothe peripheral edge of the plate 51', in the same manner as the recesses65 in the plate 51 extend to the peripheral edge of the plate 51, exceptthat the outer portions of the recesses 65 are substantial'ly the samewidth as the diameter of the circular portions of the recesses 65, ormore than twice the diameter of the metal rod from which the tine ismade.

Onthe other hand, the reduced portions 12 of the recesses 1I aresubstantially twice the diameter of the spring metal rod forming thetines. The purpose of this is to snugly receive the tines when formed inthe manner shown in Fig. 6. In this form, each tine is provided with anopen loop or eye 13,*except that the shank portion, instead of beingwide, and with the sides spaced apart as at the open loop or eye 63,which is substantially inthe form of a hook with the bill extendingoutwardly, parallel to a diametrical line through the plate, and withboth` sides of the loop substantially parallel thereto, and to eachother, is constricted. The eye 1.3 has a forwardly 'oset or bent portion14 at the shank previous tov the formation ofthe eye 13, and the endportion 15 is bent inwardly in an opposite direction toward the portion14 to form a constricted shank portion corresponding to and snuglyiitting the restricted throat portion 12 of the recess 1|. Y v

This is due to the fact that the outer portion 12 of the recess issubstantially twice the size ofthe metal forming the tine so that theportions 14 and 15 are snugly and rmly held therein and prevented fromradial displacement. 'Ihe tines are thus arranged in circular planes orseries on shaft 54. Y y

Both forms may be readily assembled by moving the eye and shank intoposition axially; or

maybe provided for all to retain the anchored ends of the tines againstlateral or axial displacement. This plate has spaced holes 48l] toreceive the clampingfmeansor .bolts -18',1which,

also, extend through thebores' or .holes 1.1 in:

radial recesses 65, extending through lor com-- municating with theperiphery thereof, asin previously described forms.

Projections, or studs 68", integral or attached kto the plate 51,-extend from the latter centrally at the depressed faces or bases oftherecesses 65 to receive the loops 463 thereon when disposed in therecesses 65. This holds the'coils or loops 63 and tines in position andagainst radial displacement and turning circurnierentially, or oth.

erwise, when the plate -19 is'bolted in position by clamping means orbolts 18 engaginglholes 11 and in the plate 51 and retaining plate or-Washer 19. These bolts 18 ,areV located at recesses 65a, between therecesses' 65, as in Figs. 6 and?,

and held'by washers andnuts.H Y

In Figs. 10 and V11 of the drawings, the construction is similar to thatshown in Figs. 8 and 9, except that the projections, teats or studs,68o, instead of being integral with the plate 51, ,are in the form ofheaded rivets or separate pins' having reduced shanks 68e anchored'inthe holes or bores 69 in the plate 51,*centrally'ofjthe. re-

cesses 65 and formedvwith enlargements 68a inv the recesses 65 toreceive the loops .63 thereon when ltted in the recesses 65.V Bolts18jengage holes 11 and 80 in the plates 51.' cesses 65a.

In all forms, the retaining plates or washers,

such as 61 and 19, engage the loops in spaced.

relation to plates 51 and 51', so that whenthe retaining plates arebolted in vposition and the washers and nuts tightened, the loops andtinesV will be iirmly held in position and against lateral or radialdisplacement or from turning,but,'may be readily removed or replaced, ifnecessary, rsuch as where a tine is broken. Y'

While I have illustrated and described certainpreferred forms ofconstructionv for earryingrnyv Having thus described my invention, whatI1- and 1e at .re--

claim as new and desire to secure by Letters Patent is:

1. A tiller comprising a hub having a radial plate portion of circularcontour with recesses on one side communicating with the peripherythereof, said recesses having circular portions and restricted throatportions adjacent the periphery, tines having loops with constrictedShanks seated in the recesses and throat portions, and means securedagainst the plate over the recesses and loops to prevent displacement ofthe tines and loops laterally from the recesses.

2. In a soil conditioner, a rotary shaft, a. sleeve fixed to said shaftand having a radial flange with recesses in a face thereof extendingthrough its peripheral edge, arcuately curved tines having pointed outerends, a coiled spring portion adjacent the inner ends and substantiallytangential to the periphery of said ange, and the inner end portion ofeach tine being reversely curved to form a loop iitting in itsrespective recess, and with the end thereof projecting outwardly to theperiphery of a convolution of said coiled spring portion, and meanssecuring said loop within said recess.

3. In a tiller, a rotary shaft, a sleeve xed to said shaft and having aradial flange with recesses in a face thereof extending through itsperipheral edge, arcuately curved tines having pointed outer ends. acoiled spring portion adjacent the inner ends substantially tangentialto 6 the periphery of said ange, and an inner end portion of each ofsaid tines being reversely curved to form a loop tting within itsrespective recess, and with an end thereof projecting radially outwardlyto the periphery of a convolution of said spring portion, the sides ofsaid loop being spaced equidistant each side of a line extending fromthe tip of the tine through the center of the coil, and means forsecuring said loop within said recess.

ROY A. KROPP.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 324,000 Beutel Aug. 11, 1885328,670 Hall Oct. 20, 1885 622.162 Pattison Mar. 28, 1899 707,624 NilesAug. 26, 1902 823,240 Waterman June 12, 1906 1,676,646 Funk July 10,1928 1,768,289 Mohr June 24, 1930 2,214,702 Seaman Sept. 10, 19402,221,221 Seaman Nov. 12, 1940 FOREIGN PATENTS Number Country Date 621Great Britain 1852

